Sound reproducing with remote amplifying transducer

ABSTRACT

A vehicle sound system has a power amplifier integrated with a loudspeaker at each of four remote locations. An LED or diode laser transduces an electrical signal from a tuner or tape player at low level into a corresponding light signal that is transmitted over optical fibers to each remote location to a phototransistor that converts the light signal into a corresponding electrical signal that is amplified by the power amplifier and then reproduced by the loudspeakers. Leads from the vehicle battery carry D.C. power to each location for energizing the power amplifiers and phototransistors.



